.page-about {
  background: var(--ink-900);
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 6vw, 88px) 0 clamp(38px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(90% 72% at 92% 6%, rgba(49, 225, 212, .10) 0%, rgba(7, 14, 46, 0) 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 100%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  min-width: 0;
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-hero-copy .breadcrumb {
  margin: 0 0 22px;
}

.page-about .about-hero-copy .eyebrow {
  margin: 0 0 14px;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-about .about-hero .lead {
  margin: 0 0 28px;
  max-width: 36em;
  font-size: var(--fs-lead);
  line-height: 1.74;
  color: var(--muted);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  object-fit: cover;
}

.page-about .about-figure--hero img {
  box-shadow: 0 30px 70px -42px rgba(49, 225, 212, .5);
}

.page-about .about-figcap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 骨架：左轨道 + 右内容 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 0;
  padding: clamp(28px, 4vw, 56px) 0 0;
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(36px, 4vw, 72px);
    align-items: start;
  }
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 左侧轨道 ---------- */
.page-about .about-rail {
  display: flex;
  gap: 8px;
  margin: 0 0 6px;
  padding: 0 0 14px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.2;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--cream);
  border-color: var(--cyan);
}

.page-about .about-rail-link.is-active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(49, 225, 212, .10);
}

@media (min-width: 1024px) {
  .page-about .about-rail {
    position: sticky;
    top: 92px;
    display: block;
    margin: 0;
    padding: 0 0 0 14px;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-rail-link {
    display: block;
    width: 100%;
    margin-left: -15px;
    padding: 9px 0 9px 13px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    line-height: 1.45;
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link:focus-visible {
    color: var(--cream);
    border-left-color: var(--line);
    background: transparent;
  }

  .page-about .about-rail-link.is-active {
    color: var(--cyan);
    border-left-color: var(--cyan);
    background: transparent;
  }
}

/* ---------- 档案块 ---------- */
.page-about .about-block {
  padding-block: clamp(36px, 5vw, 60px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-about .about-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-block-head {
  margin-bottom: clamp(22px, 3vw, 36px);
  max-width: 46em;
}

.page-about .about-block-head .eyebrow {
  margin: 0 0 12px;
}

.page-about .about-block-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.005em;
  color: var(--cream);
}

.page-about .about-block-lead {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-lead);
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-cols {
  display: grid;
  gap: clamp(24px, 3.5vw, 48px);
  min-width: 0;
}

@media (min-width: 860px) {
  .page-about .about-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-cols--wide-left {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }
}

.page-about .about-text {
  min-width: 0;
}

.page-about .about-text p {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-text p:last-child {
  margin-bottom: 0;
}

.page-about .about-text h3 {
  margin: 26px 0 10px;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

/* ---------- 能力矩阵 ---------- */
.page-about .cap-matrix {
  border-top: 1px solid var(--line);
}

.page-about .cap-row {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  min-width: 0;
  transition: background-color .18s ease, box-shadow .18s ease;
}

@media (min-width: 820px) {
  .page-about .cap-row {
    grid-template-columns: 156px minmax(0, 214px) minmax(0, 1fr);
    gap: clamp(16px, 2.4vw, 32px);
    align-items: baseline;
    padding: 18px 12px;
  }

  .page-about .cap-row:hover {
    background: rgba(49, 225, 212, .07);
    box-shadow: inset 2px 0 0 0 var(--cyan);
  }

  .page-about .cap-row:hover .cap-note {
    opacity: 1;
  }
}

.page-about .cap-key {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .cap-val {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .cap-note {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
  opacity: .86;
  transition: opacity .18s ease;
}

/* ---------- 年份刻度 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl-item {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
  min-width: 0;
}

.page-about .tl-item:first-child {
  border-top: 0;
  padding-top: 0;
}

@media (min-width: 640px) {
  .page-about .tl-item {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: clamp(16px, 2.5vw, 32px);
    align-items: start;
  }
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--cream);
}

.page-about .tl-item--now .tl-year {
  color: var(--orange);
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .tl-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 条目清单 ---------- */
.page-about .fact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.page-about .fact-item {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
  min-width: 0;
}

.page-about .fact-item:first-child {
  padding-top: 0;
}

.page-about .fact-item::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 合作生态（靛紫分区） ---------- */
.page-about .about-block--violet {
  margin-block: clamp(28px, 4vw, 48px);
  padding: clamp(26px, 4vw, 46px) clamp(18px, 3vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(60, 42, 120, .74) 0%, rgba(14, 26, 71, .94) 68%);
}

.page-about .partner-card {
  min-width: 0;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(4, 10, 34, .42);
  box-shadow: var(--shadow);
}

.page-about .partner-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .partner-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

.page-about .partner-note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(49, 225, 212, .28);
  max-width: 46em;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 行业认可 ---------- */
.page-about .honor-plate-wrap {
  min-width: 0;
}

.page-about .honor-plate {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
  color: var(--amber);
}

.page-about .plate-frame {
  stroke: currentColor;
}

.page-about .plate-frame-soft {
  stroke: currentColor;
  opacity: .38;
}

.page-about .plate-year {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .02em;
  fill: var(--amber);
}

.page-about .plate-line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  fill: var(--muted);
}

.page-about .honor-dims {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
  border-top: 1px solid var(--line);
}

.page-about .honor-dims li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .dim-key {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .dim-val {
  display: block;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 服务准则 ---------- */
.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .principle {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-about .principle:last-child {
  border-bottom: 1px solid var(--line);
}

@media (min-width: 700px) {
  .page-about .principle {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: clamp(16px, 2.5vw, 32px);
    align-items: start;
  }
}

.page-about .principle-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .04em;
  color: var(--line);
}

.page-about .principle-body {
  min-width: 0;
}

.page-about .principle-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .principle-body p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .principle-foot {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  line-height: 1.72;
  letter-spacing: .02em;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(36px, 5vw, 64px) 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(110, 31, 60, .34) 0%, rgba(7, 14, 46, 0) 100%);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 18px;
  max-width: 44em;
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.2;
  color: var(--cream);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}